Pin for dredges or dredging-chains.



PATBNTED MAR. 17, 1908.

W. BRINTON. PIN FOB. DREDGES 0R DREDGING CHAINS.

LPPLKCATION FILED JUNE l5, 1907.

UNITED Sllr-firlzl ljrltlfllillil WALTER BRINTON, Ol" HIGH. BRIDGE, NEW

JERSEY, ASSGNOR- TO TAYLOR IRGN i: STEEL COMPANY, Oll` HIGH B RIDGE, NEW JERSEY, A COllOlt).

TIO OE NNW JERSEY.

.PIN FOR DREDGES OR DREDGING-CHAINS.

Specification of Letters Patent.

. Patented lllaz'ch 1T, 1908.'

Application filed June 15, 1907. Serial No. 379,285,

To all whom it may Cfmcern: v

Be it known that l, VJALTER BmNroN, a' citizen ofthe United States, residing in High Bridge7 .in the County of Hunterdon and Stnto of NewJersoy,hnve invented certainnew and useful Improvements in Pins for Dredges or Dredging-Chains, of which the following is s, specioation.

This invention consists in the provision of an improved pin for use in dredging machinery, especially in connection Witli the buckets or chains thereof, an object oi' the invention being to so construct the pin that it may be 'made of unmeohineable metal.

A further object oi' the invention is the provision of a cast, manganese-steel tubular dredge-bucket or chain nin. A

A further object of ti e invention is the provision of a tubular, unmaohinesh'lo metal dredge-chain pin so constructed that notwithstanding a large part thereof :may in use be worn away it will still be sniliciently strong to resist breakage, so that the life .ol the pin will be materially prolonged.

In the drawings accompanying and l'orminfr part of thisI specification, lligurix l is i si e View of this improved pin; Fig. l is :in end View thereof, looking :l'rorn righi to lvl't: Fig. 3 is a. diegrammntio View on nn enlarged scale, illustrating the construction of ihr pin; Fig. 4 is a Cross-sectional view tnlien in lino 1f-a, Fig. 3; and Fig. 5 is n View of :mother form of this pin.

Similar characters ol' retort-nre indient(x corresponding parts throughout the di'lvrvnt iignres of the drawings.

llt is believed that drodgv-hnrlul or rhnin pins made of manganese stool will he n muterial improvement over other l'orms ol stool pins, owing to thi. l'nr't that This mnwrinl is ver)T hard, so hnrd in lnrt ihni' thil onliY prnrticnlilo 'modt` oi nmi'hinin;- ii is l\ \f g hiding. so that it is usually considered :is unn, able, and so tough when properly l ronlvd that it is nlmost imhrvnltnhlo, so ihni its combined hardness :md longhm-ss molto it am ganas@ stoel and successfully treated to oh tain that combined hardness :ind toughness which 1s essential to enable manganese stoel pins to he used in this 'Gloss oi ninehinery.

lt is not practicable to make the pins solid. of manganeso steel, becziuse in this form the successful heat treatment or" the same could not' he carried out sind ,Consequently the results obtained would he unsatisfactory. ln order to ,properly heat trent manganese steel, it` is essential that the structure or article to he treated should he of uniform thickness and not too thick. ii too thick the heut treatment is not (.eflioient. In; these pins vary in size, frequently having :i dirfnnoi-or of from four to livr inches, or grenier, it would not be practicable to heat trout :i solid pin ol" this diameter. The liest results are ol)- tnined in thel hout treatment ol" this stool when the thickness oi tho nwtnl is not greater than approximately three inches, which, however, "s too small :i dizinwterfor the ancrage sized pin. to provide a manganese steel pin which will here the desired strength :ind durnhility, it must he so constructed that notwilhsinndiug its diameter muy ho thrrn or more inrlws tho bodyY ol metal forming the sami" will noi nt any point exceed in thirknfss that whivh. is beyond the limit oi' snlttjv'. To nrcoinplish this result thtl pin, during they rnsiing their oit, of manganeso stool. which is understood to he :in unnmrhinonhln moird. is modo tul ular .'rorn rndjlo 0nd ihm-rol, th(` horn or hoh l. thvroihrough honig nl 'Ynrnd diameter, gow

ideal material, in consrquvnw nl whivh pins l inside oi this mnlorid will hnru n vor); long h'l'e. But unless manganeso stool is properly treated this metal,V notwithslnnding its lmrdness, is very hritllo.

The ohjlct, ilierel'oro, ol' thi` proscrit inYrntion is to provide pinsol' i hr hiss spuvilhd so constructed that they cnn hn umdrol' mnnornud hy ihr diameter ol' ihr nin, host suiwd l'or tln` tronlmont proress ol the pin. The holo muy he of nny dinmtivr in proportion to tho exterior dinmctrr ol' the pin, provided th(` wills ol' the pin. 1'. ff., iinl nm'rnl lwftu'ee-n Ihn horn :and ihn onrvr snri'nrt. do not in any y rush wai-ord nppl'oxinmirly ihren inf-hors. lli' .rr-hnwi loi-ming ihn inn in this nmmwr the result ilml ,when lrlrhii d lo lwnl treatment', whit-h vonsisis in plzn'ing thv pin innfnrnnco :and homing il up lo n |undetermined te1n pxrninri- :rnd 'dion rapidly cooling it. ns hy olomuntl holh ln` iniwrior :1nd the exterior portions ol thu pm :m` tong'hlnod,wherens il:

I the nin worn l'ormod .solid f lnngrrnus strains would ho gonnrniod hoih hy thv heading ond voolmg promesses, l. .'f., dl thv pm were formed solid, m inughomng d linplnnglng it WlnlO t illlnwrsion in nnirr or mld-r honi nhsorliil't.

seme@ tougliens rapidly, and in e pin of e. diameter*r et tliree inehes oi1 ove-s these is e short peiiod of: time before the cooling process penetrates tliongliout the entire body. During that time and While the eoie still liet, creeks occur and radiate from the oentei of the i. 'n to Within eey one-heli of three-qe ei eis o' en inch oi" the ontside. These creeks4 ese not pei'eeptible to the eye, 'out when vthe ein is in sevioe and under strain, they extend i l' nellgT cause breakage. 'itlis eel it is diileent. The wete? enteis the lio core, :ind cooling oeeuis-ffonntl the inside endviee tresse.

all Vstiein and permits mening l fiee il'om ieWs end any tende; .y Fnrtliemoi'e, if the pin Weise oiroeclsolid, While thelieet treatment may extenel soin the sui'feee invia-idly' e oonsiiileieble ,dept/nj Vet-end this especially when tiie'pin is off' large diemeteL--en appreciable potion oi'.

alle eore and outwardly Ytlieiefi'oni will 'be iett'nntougliened, 0;' et leest not so te ,ouglily tougliened as the elite suf-ieee,

es some of this toughenecl outessuiie-ee isneoessoiiljf ground away during the finishing of the pin, eonsequentl7 when the 'pin in use lies become Worn 'clown to this nntonglienecl oi not so tlioyougllly tougliened -potion the pin'willquioldy breek, since,A es hereinbeioi'e stated, when not ropezly tougliened mengeiiese steel isveiy *iittle By so forming .the pin that both. its exteiior-end its interior ere gllened? the iesult is that the nie/tel inteisfei te tiiese two tieetecl oi' seperated noiwill also be somewliet sus sees 'Les'. possieiy not to the seme extent e e ne im sulleiently to insure prooe tonglio. i give to the entire pin tl et eemlsinee ienlness end tonlniess so necessnif in en oitiele of tlis sind.; and. even though intei'mediste 'metal is not moglie' ened et all, yet when tlieeteiioi toughened n. i n,

.l er and inner snifaees poztiene of lese Worn ifm/'ey tlie inteiioi' tougliened.

tubulervmembers or potions 2 3, one' edjeeent to end ieiinmg the Wall 'of the-hole 10 Athe pin and the other edgeeent to and einen it is 'eppelienflefl lies also been 111e-, terielly beneiited enti wandered somewhat tough. After the pin lies been mede end ytreated in the ineiiiei inclieetechit is usually "ieisliedj this being .en telf. lace/.for instance, down to the line lasted. y 5. This removes it part of the tengliene-portion etiche surfe-oe. A

l' E I' one ifoiin of pin prevented from *ing by means oli en elim or projection 12 'en opening'il fer tlie reception of a v gennaio., Consequently' in this form Wees oline-pm comes largely on one side, instance, itnmy finally reach down to e iened portion of the manganese steel li oziginelly formed the strong end resisten suiieoe'potion or outer Well of the pin et thereof. Thus, it-Will be observed dining this Wear'reduetion, which would eveivituoillfoiiig en ordinary steelv pin to e conditionfreqiing replaoement,` that not- Wi @standing thetho'rouglily touglienexl outer Well or s Wiese 2 lies been Worn away the tlioiong. toughenefl interior portion or well besmet witlino impairment Whatever, lont :retains its full measure of strength kand its original highly resistant character in-'zaJ tubular forni around .the interior of the `pin, Whereas if the pin were mede solid this would not be the oase, end in consequence when the touglienefl outei' surface lied been Won sway *i ruling the-outs? Wall, and seperated from z eeeli ether bye heidened portion or zone This results in theI ioiinetion'oi .tno thoroughly toughened Steel done by grinding, which there would not sullieient tougliened pon l tion femaining to prevent the breaking of the pin.- and in consequence it could not be mede of the pin between' the lines 6 anu 7, v

Wliieli may not beso thoioughly tonglienegl, :intl the unbreakable quality ofthe pm is' still ores-ent, owinvto the feet that e lergepo'iftion L .f' 'I tough on eecountiof itsv those now employed in gold mlning y deepesame ing arm 1s iu soiue` forms preferably made,

tapered, as is also the free end of the pin, and the end thereof Where the locking arm is located.

The resent im roveinent is particularly adapte foruse wit1heavydredges,es ecially dredging, and this improved pin acts alter the manner of a beam in which one side corresponds to and acts as the compression niember, While the other side corresponds to aud acts as the tension member, this latter meniber being unimpaired by the Wearing a wa;Y of one' side of the pin as described in connection with Fig. 3.

I claim as my invention:

1. An unriachineable metal, tubular dredge-bucket or chain piu.

2. An unmachineable metal, cast, tubular dredge-bucket or chain pin.

3. An unmaehineable metal, tubular dredge-bucket or chainrpin having a pair of separat-ed tubular thoroughly tougheried surfaces.

4. A manganese steel, tubular dredgebuclret or chain pin having a pair of treated surfaces, one forming the interior and the other the exterior surtace thereof.

5. A cast manganese steel dredge-bucl-et or chain pin, heat treated and having exterior and interior tubular surfaces, one forming the interior wall of the pin and the other the exterior wall thereof, with a thoroughly treated zone between such outer and inner Walls.

6. A cast manganese steel dredge-bucket .or 'chain pin, heat treat-ed and having exterior and interior tubular surfaces, one forming the interior Wall othe pin and the other the exterior wall thereof, with a pair of toughened Zones between such outer and Walls, separated h v a hardened zone al' metal.

7. An uniiiaehiueahle metal, tubular, dredge-bucket or chain piu having a p if' or separated toughened portions, one eoi ing the exterior and the other the iu f wall of such pin.

8, A cast, uniuachiueahle metal dredgebucket or chain pin having two rf ned, tubular Walls or portions, one ceesw Jsting the exterior and the other the ini 'or surface ol' suoli piu, and separated by thoroughly hard metal.

9. A east, unmachiiicahle metal dredgehucket or chain piu having 'two toughened tubular walls or portie.' one' constitutingo the exterior and the other the .interior surface of such pin. and separated by a thoroughly hard zone ol metal, said pin having a locking arm at one end thereof.

10, A mear-resisting, thoroughl treated, 65. 4tougheued, uniuachineahle meta dredgehuelret or chain pin.

fil. A hollow, cast, manganese steel,

dredge-liucfet or chain pin.

[12. A hollow, cast, toughened, manganese steel dre lge-huel-et or chain pin. w

13. A cast, uumachirieahle metal dredgehuclret'or chain pin, having a here extending therethrough of such size that Whatever the diameter' of the pin be the metal between-75 such bore and the exterior surface will not exceed approximately three inches.

14. A cast,l foughened, manganese steel dredge-bucket r chainpin, having here extending therethrough of such size that whatever the diameter of the ein he the metal between such. here and the exterior surface -will not exceed approximately inches.

WALTER BRNTN. Witnesses:

A.. F. MURRAY, C. H. WERD. 

